See Schering Corp. v. Geneva Pharms., Inc., 339 F.3d 1373, 1377 (Fed. Cir. 2003) (“Continental Can does not stand for the proposition that an inherent feature of a prior art reference must be perceived as such by a person of ordinary skill in the art before the critical date.”); In re Omeprazole Patent Litig., v. Andrx Pharms, Inc., 483 F.3d 1364, 1373 (Fed. Cir. 2007) (recognition in the prior art is not necessary when the claimed characteristic or function is inherently present in the prior art).